fix: fixup regex typo for validChainIdHex

[frankvonhoven]

Description

There was a typo in the regex usage of the validChainIdHex method.

This fixes it from snake case to camel case

Related issues

Fixes: #8302

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

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• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
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Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[sethkfman]

LGTM

[github-actions]

E2E test started on Bitrise: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/93a01be6-3e7b-480e-b4b8-649f0011189d
You can also kick off another Bitrise E2E smoke test by removing and re-applying the (Run Smoke E2E) label

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (f791282) 40.21% compared to head (819190b) 40.21%.

Files	Patch %	Lines
...Settings/NetworksSettings/NetworkSettings/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8303   +/-   ##
=======================================
  Coverage   40.21%   40.21%           
=======================================
  Files        1235     1235           
  Lines       29885    29885           
  Branches     2863     2863           
=======================================
  Hits        12018    12018           
  Misses      17176    17176           
  Partials      691      691           

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[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud